Sienna Miller shows off her rear assets as The Baroness in this new pic from the upcoming superhero flick, G.I. Joe: Rise of Cobra.
Also pictured: Channing Tatum as Duke, Rachel Nichols as Shana 'Scarlett' O'Hara, Ray Park as Snake Eyes, Marlon Wayans as Ripcord and Byung-hun Lee as Storm Shadow.
More promo pics here. Pics of Channing filming in costume here. Sign up for updates at GIJoeMovie.com. Add movie to your MySpace.